Ternary Phase Equilibria in Transition Metal-Boron-Carbon-Silicon Systems. Part 2: Ternary Systems. Volume 3: Zr-Ta-C System
Abstract
The ternary zirconium-tantalum- carbon system was investigated using X-ray, DTA, melting point, and metallographic techniques on chemically analyzed alloys; a complete phase diagram for temperatures above 1000 deg C was established. The system contains a high melting continuous solid solution of binary monocarbide phases; a moderate zirconium-tantalum exchange occurs in both the high and low temperature modifications of the subcarbide, Ta2C. Two four-phase reaction planes and two limiting tie-lines are present in the metal-rich portion of the ternary diagram. A minimum melting point occurs in the zirconium-rich portion of the ternary. The results of this investigation are described and discussed; selection of alloys for general high temperature applications is discussed in the light of the results of the Zr-Ta-C investigation. A brief thermodynamical evaluation of the system is given along with a calculated isothermal section at 1500 deg C.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1965
- Accession Number
- AD0476624
Entities
People
- C. E. Brukl
- D. P. Harmon
Organizations
- Aerojet Rocketdyne Holdings